Explore 3D models of these wonderful designs. In the mid-1480s, Leonardo da Vinci designed an armored tank for the Duke of Milan. Explore a 3D model of this innovative design and learn how it ...

The very concept of an "armored vehicle" has been around for at least as far back as 1482, when Leonardo da Vinci penned a letter ... by placing an armored car body onto a Killen-Strait tractor ...